Aluminum Driveshaft Max RPM
#13
GFYS and STFU
iTrader: (8)
Yes it does. The smaller the tire the faster your DS will spin and the more likely/sooner it will fail. It's not so much speed of your vehicle but the speed of your DS and that's relative to the combination of your tire size, tranny gears and rear end gears.
I was able to go 120ish before I started noticing issues with my DS but that was due to my 3.23 gears(which let me drive faster while keeping DS speed down) and my tires size which were a bit bigger.
I was able to go 120ish before I started noticing issues with my DS but that was due to my 3.23 gears(which let me drive faster while keeping DS speed down) and my tires size which were a bit bigger.
#14
Where's the Beef?
iTrader: (8)
Yes it does. The smaller the tire the faster your DS will spin and the more likely/sooner it will fail. It's not so much speed of your vehicle but the speed of your DS and that's relative to the combination of your tire size, tranny gears and rear end gears.
I was able to go 120ish before I started noticing issues with my DS but that was due to my 3.23 gears(which let me drive faster while keeping DS speed down) and my tires size which were a bit bigger.
I was able to go 120ish before I started noticing issues with my DS but that was due to my 3.23 gears(which let me drive faster while keeping DS speed down) and my tires size which were a bit bigger.
what's a DS cost now days? (i have a 2 piece)
#16
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Join Date: Nov 2006
Location: League City, Texas
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Here is a link to a driveshaft critical speed calculator. You will need some detailed measurements and physical properties, but this will give you the exact RPM that a shaft will start to whip itself into scrap.
Keep in mind that if you accelerate through the critical speed fast enough, you get another RPM operating range (before the next harmonic) where the shaft will stabilize. At the next harmonic, the shaft will again go critical, and if held at the critical speed, will self destruct.
Keep in mind that if you accelerate through the critical speed fast enough, you get another RPM operating range (before the next harmonic) where the shaft will stabilize. At the next harmonic, the shaft will again go critical, and if held at the critical speed, will self destruct.
#18
The shaft on my truck (04 RCSB) is roughly 58"-60" or so and has never blown at 130mph, and I have done it many many times. It doesn't even vibrate.... What truck has a 80 something inch long shaft? Crew cab? Heck, I don't think my shaft is alluminum, it's steel. WTF?
#20
Okay, I don't know if that is good or bad, but at least mine has been good so far. Got 60,000 on it though, I will probably want to put new U-joints in it soon. I know their is a difference in weight, between steel shaft, and alluminum shafts, but what power gains are there really? I would think it would be marginal at best to go from a steel shaft to alluminum shaft. Maybe I am wrong? Is there a company selling aftermarket shafts that are balanced well for RCSB trucks?